////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2012-2021 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// This file is part of Octave.
//
// Octave is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Octave is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Octave; see the file COPYING.  If not, see
// <https://www.gnu.org/licenses/>.
//
////////////////////////////////////////////////////////////////////////

#if defined (HAVE_CONFIG_H)
#  include "config.h"
#endif

#include <iostream>

#include "ov.h"
#include "ov-classdef.h"
#include "pt-args-block.h"
#include "pt-classdef.h"
#include "pt-eval.h"

namespace octave
{
  tree_superclass_ref *
  tree_superclass_ref::dup (symbol_scope&) const
  {
    tree_superclass_ref *new_scr
      = new tree_superclass_ref (m_method_name, m_class_name,
                                 line (), column ());

    new_scr->copy_base (*this);

    return new_scr;
  }

  octave_value_list
  tree_superclass_ref::evaluate_n (tree_evaluator& tw, int nargout)
  {
    octave_value tmp
      = octave_classdef::superclass_ref (m_method_name, m_class_name);

    if (! is_postfix_indexed ())
      {
        // There was no index, so this superclass_ref object is not
        // part of an index expression.  It is also not an identifier in
        // the syntax tree but we need to handle it as if it were.  So
        // call the function here.

        octave_function *f = tmp.function_value (true);

        assert (f);

        return f->call (tw, nargout);
      }

    // The superclass_ref function object will be indexed as part of the
    // enclosing index expression.

    return ovl (tmp);
  }

  tree_metaclass_query *
  tree_metaclass_query::dup (symbol_scope&) const
  {
    tree_metaclass_query *new_mcq
      = new tree_metaclass_query (m_class_name, line (), column ());

    new_mcq->copy_base (*this);

    return new_mcq;
  }

  octave_value
  tree_metaclass_query::evaluate (tree_evaluator&, int)
  {
    return octave_classdef::metaclass_query (m_class_name);
  }

  // Classdef attribute

  // Classdef attribute_list

  tree_classdef_attribute_list::~tree_classdef_attribute_list (void)
  {
    while (! empty ())
      {
        auto p = begin ();
        delete *p;
        erase (p);
      }
  }

  // Classdef superclass

  // Classdef superclass_list

  tree_classdef_superclass_list::~tree_classdef_superclass_list (void)
  {
    while (! empty ())
      {
        auto p = begin ();
        delete *p;
        erase (p);
      }
  }

  // Classdef property

  std::string check_for_doc_string (comment_list *comments)
  {
    // If the comment list ends in a block comment or full-line comment,
    // then it is the doc string for this property.

    if (comments)
      {
        comment_elt last_elt = comments->back ();

        if (last_elt.is_block () || last_elt.is_full_line ())
          return last_elt.text ();
      }

    return "";
  }

  tree_classdef_property::tree_classdef_property (tree_arg_validation *av,
                                                  comment_list *comments)
    : m_av (av), m_comments (comments),
      m_doc_string (check_for_doc_string (m_comments))
  { }

  tree_classdef_property::~tree_classdef_property (void)
  {
    delete m_av;
  }

  tree_identifier * tree_classdef_property::ident (void)
  {
    tree_expression *id_expr = m_av->identifier_expression ();

    return dynamic_cast<tree_identifier *> (id_expr);
  }

  tree_expression * tree_classdef_property::expression (void)
  {
    return m_av->initializer_expression ();
  }

  // Classdef property_list

  tree_classdef_property_list::~tree_classdef_property_list (void)
  {
    while (! empty ())
      {
        auto p = begin ();
        delete *p;
        erase (p);
      }
  }

  // Classdef properties_block

  // Classdef methods_list

  // Classdef methods_block

  // Classdef event

  tree_classdef_event::tree_classdef_event (tree_identifier *i,
                                            comment_list *comments)
    : m_id (i), m_comments (comments),
      m_doc_string (check_for_doc_string (m_comments))
  { }

  // Classdef events_list

  tree_classdef_events_list::~tree_classdef_events_list (void)
  {
    while (! empty ())
      {
        auto p = begin ();
        delete *p;
        erase (p);
      }
  }

  // Classdef events_block

  // Classdef enum

  tree_classdef_enum::tree_classdef_enum (tree_identifier *i,
                                          tree_expression *e,
                                          comment_list *comments)
    : m_id (i), m_expr (e), m_comments (comments),
      m_doc_string (check_for_doc_string (m_comments))
  { }

  // Classdef enum_list

  tree_classdef_enum_list::~tree_classdef_enum_list (void)
  {
    while (! empty ())
      {
        auto p = begin ();
        delete *p;
        erase (p);
      }
  }

  // Classdef enum_block

  // Classdef body

  tree_classdef_body::tree_classdef_body (void)
    : m_properties_lst (), m_methods_lst (), m_events_lst (), m_enum_lst ()
  { }

  tree_classdef_body::tree_classdef_body (tree_classdef_properties_block *pb)
    : m_properties_lst (), m_methods_lst (), m_events_lst (), m_enum_lst (),
      m_doc_string (pb ? get_doc_string (pb->leading_comment ()) : "")
  {
    append (pb);
  }

  tree_classdef_body::tree_classdef_body (tree_classdef_methods_block *mb)
    : m_properties_lst (), m_methods_lst (), m_events_lst (), m_enum_lst (),
      m_doc_string (mb ? get_doc_string (mb->leading_comment ()) : "")
  {
    append (mb);
  }

  tree_classdef_body::tree_classdef_body (tree_classdef_events_block *evb)
    : m_properties_lst (), m_methods_lst (), m_events_lst (), m_enum_lst (),
      m_doc_string (evb ? get_doc_string (evb->leading_comment ()) : "")
  {
    append (evb);
  }

  tree_classdef_body::tree_classdef_body (tree_classdef_enum_block *enb)
    : m_properties_lst (), m_methods_lst (), m_events_lst (), m_enum_lst (),
      m_doc_string (enb ? get_doc_string (enb->leading_comment ()) : "")
  {
    append (enb);
  }

  tree_classdef_body::~tree_classdef_body (void)
  {
    while (! m_properties_lst.empty ())
      {
        auto p = m_properties_lst.begin ();
        delete *p;
        m_properties_lst.erase (p);
      }

    while (! m_methods_lst.empty ())
      {
        auto p = m_methods_lst.begin ();
        delete *p;
        m_methods_lst.erase (p);
      }

    while (! m_events_lst.empty ())
      {
        auto p = m_events_lst.begin ();
        delete *p;
        m_events_lst.erase (p);
      }

    while (! m_enum_lst.empty ())
      {
        auto p = m_enum_lst.begin ();
        delete *p;
        m_enum_lst.erase (p);
      }
  }

  std::string
  tree_classdef_body::get_doc_string (comment_list *comments) const
  {
    // Grab the first comment from the list and use it as the doc string
    // for this classdef body.

    if (comments)
      {
        comment_elt first_elt = comments->front ();

        return first_elt.text ();
      }

    return "";
  }

  // Classdef

  octave_value
  tree_classdef::make_meta_class (interpreter& interp, bool is_at_folder)
  {
    cdef_class cls = cdef_class::make_meta_class (interp, this, is_at_folder);

    if (cls.ok ())
      return cls.get_constructor_function ();

    return octave_value ();
  }
}
